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Bleeding air from the hydraulic fold system
Before starting the procedure
WARNING:
Leaking fluid under pressure can enter the skin causing serious injury. Release pressure
before disconnecting hydraulic or other lines. Tighten all connections before applying
pressure. Keep hands and body away from pinholes and nozzles which eject fluids under
high pressure. Wear correct hand and correct eye protection when looking for leaks. Use a
piece of cardboard or paper instead of your hand. Any fluid injected into the skin can
cause gangrene. The fluid must be removed by a doctor familiar with this type of injury.
WARNING:
Be careful of sweeps or blades when folded to prevent serious injury. Never keep the
machine with the wings in the folded position.
IMPORTANT: Do not fold or unfold the fold system before bleeding air from the fold system.
To bleed the air from the hydraulic fold system, connect the machine to a tractor that is the correct size
to operate the machine. See the information for minimum tow vehicle weight.
Total volume of oil required to fill the fold system is 24 gallons(estimated).
Completely bleed the hydraulic system of air when:
The fold system is filled with hydraulic oil for the first time.
Air has entered the hydraulic system through a leak or through repair of the hydraulic system.
Procedure
1.
Set the tractor hydraulic flow to less than 75.7 L/min (20 gal/min).
IMPORTANT: If the hydraulic flow is set to more than 75.7 L/min (20 gal/min), the hydraulics will not
operate correctly.
NOTE: Restrictors are installed in the fold cylinders to prevent falling of the wings. Never remove the
restrictors, or the machine will not fold correctly.
2.
Stop the engine, apply the park brake, and take the key with you.
3.
Connect the fold system hoses to the tractor.
4.
Make sure the tractor reservoir is full of the hydraulic oil required by the manufacturer. IMPORTANT:
Do not loosen any hydraulic fittings to bleed air from the system.
5.
Remove the pins from the rod ends of the fold cylinders.
6.
Make sure the rod ends of the fold cylinders will not come into contact with any obstructions.
If a blockage is present, lift the rod ends of the fold cylinders.
7.
Use the remote lever in the tractor to fully extend and retract the fold cylinders.
Extend and retract multiple times.
8.
If the fold cylinders are not operating together, cycle the fold cylinders to remove the remaining air.
IMPORTANT: Do not loosen any hydraulic fittings to bleed air from the system.
9.
Stop the engine, apply the park brake, and take the key with you.
10.
Check the tractor hydraulic oil reservoir to make sure the hydraulic oil reservoir is still within operating
limits.
11.
Connect the rod ends of the fold cylinders to the machine.
12.
Find an area large enough for the machine when unfolded.
13.
Park the machine on a solid, level surface. Stop the engine, apply the park brake, and take the key
with you.
14.
With the tractor at a low idle, slowly engage the hydraulics to fold and unfold the machine.
15.
Fully extend the fold cylinders to let the wings flex freely.
101
3. Assembly
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